[3][4][1][5][6] This species is found in Western North America and Northern Europe in raised bogs, ditches and temporary pools.

[7] For terms see Morphology of Diptera The frons are a shiny black with light brownish yellow pile.

The pile of the face is light brownish yellow except the facial stripe (tubercle) and the cheeks which are a shiny black.

The second segment has a large, sharply marked, yellow orange spots on the sides, widely separated by opaque black medially.

The light yellow posterior marginal bands of the second third and fourth segments are unusually prominent.